For more than five years, the Transportation Security Administration has been deploying full-body imaging scanners in our nation’s airports. About 700 scanners have been deployed in nearly 190 airports nationwide. While the agency keeps installing these devices — which most people agree intrude on our privacy — there are real doubts whether these are actually making anybody safer. Yet because TSA failed to solicit public comments about the scanners — in violation of federal law — the agency is flying blind.